Precision Micrometer, .243 Winchester
.243 Winchester Precision Micrometer -
A few twists of the Precision Micrometer and you'll know your chamber headspace and bullet seating depth to 0.001 of an inch. Precision Micrometer measures from the datum point on the case's shoulder to the base, giving you spot on ANSI/SAAMI tolerance readings. This is an indispensable tool for safe, accurate loads that extend the life of your brass and your rifle.